Internal leakage in the catalytic cracking external heat exchanger

It will affect the pressure fluctuations in the regenerator.

The most significant symptom of a leak in the tubes of the catalytic external heat exchanger is a noticeable drop in the temperature of the external heat exchanger, a decrease in the temperature of the regenerator, and fluctuations as well as increases in the pressure of the regenerator. (In severe cases, this can cause the main fan to stop operating; this is not theoretical, but a practical occurrence.) Additionally, the entry of large amounts of water into the regenerator leads to severe damage to the catalyst, resulting in an increase in the amount of catalyst particles, which in turn leads to more catalyst being present in the flue gas during desulfurization processes. Other phenomena resulting from the detailed classification of catalysts include: an increase in the catalyst dosage at the exhaust valve at the smoke extractor inlet, an increase in the pressure in the spent catalyst storage tank; the stored amount increases slowly or not at all due to catalyst loss; and a large discrepancy between the water supply and steam generation in the external heat-extraction steam drum. If the leakage is severe, it will all be completed in a short time! At most, the main fan will stop operating due to pressure buildup

External heat leakage is first manifested as a drop in the regenerator temperature, pressure fluctuations, the opening of both valves, and an increase in the particle size at the inlet and outlet of the three spinners. If changes occur in the desulfurization scrubber, the amount of leakage becomes quite large, and it may be impossible to maintain normal operation.